# Unit 4: Linear Equations & Linear Systems

 Grade 8 Illustrative Mathematics – Unit 4: Linear Equations and Linear Systems Download PDF of Student Edition Download PDF of Student Practice Work (Homework) Unit Summary for Parents – PDF File Lesson Topic IM Lesson Khan Academy Support Videos Khan Academy Online Practice Class Notes Lesson Summary & Homework Help Lesson 1 – Number Puzzles Lesson 1 Morgan 8.4.1 Lesson 2 – Keeping the Equation Balanced Lesson 2 Morgan 8.4.2 Lesson 3 –Balanced Moves Lesson 3 Intro to Equations with variables on both sides   Equations with variables on both sides: 20-7x=6x-6 Equations with variables on both sides Morgan 8.4.3 Lesson 4 – More Balanced Moves Lesson 4 Equations with parentheses Equations with parentheses Morgan 8.4.4 Lesson 5 – Solving Any Linear Equation Lesson 5 Morgan 8.4.5 Lesson 6 – Strategic Solving Lesson 6 Equations with variables on both sides: decimals and fractions   Equations with parentheses: decimals and fractions Morgan 8.4.6 Extra Practice Linear Equations Sums of consecutive Integers   Sum of integers challenge   Equation practice with vertical angles   Equation practice with complementary angles   Equation practice with supplementary angles Sums of consecutive integers   Equation practice with vertical angles   Equation practice with angel addition Lesson 7 – All, Some, or No Solutions Lesson 7 Creating an equation with no solutions   Creating an equation with infinitely many solutions Number of solutions to equations challenge Morgan 8.4.7 Lesson 8 – How Many Solutions Lesson 8 Number of solutions to equations   Worked Example: number of solutions to equations Number of solutions to equations 8.4.8 Morgan Lesson 9 – When Are They the Same Lesson 9 Age word problem: Imran   Age word problem: Ben and William   Age word problem: Arman and Diya Age word problems 8.4.9 Morgan Lesson 10 – On or Off the Line? Lesson 10 Solutions of systems of equations 8.4.10 Morgan Lesson 11 – On Both of the Lines Lesson 11 8.4.11 Morgan Lesson 12 – Systems of Equations Lesson 12 Systems of equations: trolls, tolls (1 of 2)   Systems of equations: trolls, tolls (2 of 2)   Systems of equations with graphing   Systems of equations with graphing: y= 7/5x-5 and y=3/5x-1 Systems of equations with graphing   Number of solutions to a system of equations graphically 8.4.12 Morgan Lesson 13 – Solving Systems of Equations Lesson 13 Systems of equations with substitution: y=-1/4x+100 and y=-1/4x+120   Number of solutions to a system of equations graphically Number of solutions to a system of equations algebraically 8.4.13 Morgan   Part 2 Lesson 14 – Solving More Systems Lesson 14 Systems of equations with substitution – 1   Systems of equations with substitution – 2   Systems of equations with substitution - 3 Systems of equations with substitution     Quiz 2 8.4.14 Morgan Lesson 15 – Writing Systems of Equations Lesson 15 8.4.15 Morgan Lesson 16 – Solving Problems with Systems of Equations Lesson 16 Systems of equations with word problems: no solution   Systems of equations with substitution: coins Systems of equations word problems 8.4.16 Morgan Unit 4 Review Khan Academy Unit 4 Practice Test